Clever | Portal ALEKS - Jamaya Worlds - 12-2, UpStudy Thoth AI www-awy.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNsIkr7j8P3jH-IQUhQ7UhjLUg6NO6tj9qFItz6nQLOPsPMGhY8JGUqkv5q2njARiOwdqzf4Hd3Ak_sK3po... 12-2,3 Data Question 1 of 15 (1 point) | Question Attempt: 1 of Unlimited Jamaya 1 2 3 4 5 6 7 8 9 10 11 12 13 1.) A scientist wants to find the average mass of fish living in a large pond. So she will use the masses of a sample of fish from the pond to find the average mass. Answer the questions below. (a) Which unit(s) could be used for the unit of measurement? Check all that apply. $$ \square $$ hours milligrams seconds grams kilograms (b) Which of the procedures below would be the best way to find the average mass? Randomly pick 7 fish from the entire pond and estimate their masses. Randomly pick 52 fish from the entire pond and weigh each of them. Pick 7 fish from a shallow region of the pond and weigh each of them. Pick 52 fish from a shallow region of the pond and estimate their masses. Check Save For Later Submit Assignment © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility Sign out 4 Mar 14 11:57

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UpStudy AI · Accepted Answer

Let's break down the problem step by step.

### Part (a): Units of Measurement

We need to identify which units could be used for measuring the mass of fish. The options provided are:

- hours
- milligrams
- seconds
- grams
- kilograms

**Analysis of Options:**
- **Hours**: This is a unit of time, not mass.
- **Milligrams**: This is a unit of mass (1 mg = 0.001 grams).
- **Seconds**: This is a unit of time, not mass.
- **Grams**: This is a unit of mass.
- **Kilograms**: This is also a unit of mass (1 kg = 1000 grams).

**Conclusion for Part (a)**:
The applicable units for measuring mass are:
- milligrams
- grams
- kilograms

### Part (b): Best Procedure to Find Average Mass

Now, we need to determine the best procedure for finding the average mass of fish in the pond. The options provided are:

1. Randomly pick 7 fish from the entire pond and estimate their masses.
2. Randomly pick 52 fish from the entire pond and weigh each of them.
3. Pick 7 fish from a shallow region of the pond and weigh each of them.
4. Pick 52 fish from a shallow region of the pond and estimate their masses.

**Analysis of Options**:
1. **Randomly pick 7 fish and estimate their masses**: This sample size is small, and estimating masses can introduce bias.
2. **Randomly pick 52 fish and weigh each of them**: This is a larger sample size and random selection minimizes bias, making it a good choice.
3. **Pick 7 fish from a shallow region and weigh each of them**: Again, the sample size is small, and selecting from a specific region may not represent the entire pond.
4. **Pick 52 fish from a shallow region and estimate their masses**: While the sample size is good, estimating masses can introduce bias.

**Conclusion for Part (b)**:
The best procedure is:
- Randomly pick 52 fish from the entire pond and weigh each of them.

### Final Answers:
- **Part (a)**: milligrams, grams, kilograms
- **Part (b)**: Randomly pick 52 fish from the entire pond and weigh each of them.
For part (a), the units that can be used to measure mass are milligrams, grams, and kilograms. For part (b), the best way to find the average mass is to randomly select 52 fish from the entire pond and weigh each of them.

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